3v+9v=40

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Solution for 3v+9v=40 equation: 



3v+9v=40

We move all terms to the left:

3v+9v-(40)=0

We add all the numbers together, and all the variables

12v-40=0

We move all terms containing v to the left, all other terms to the right

12v=40

v=40/12

v=3+1/3

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